Improvement



W. A. H. SBHREIBER.

Earthenware for Culinary Departments.

Patented May 26,1874.

F/G. lll.

FIG. I.

"W/TNESSES.

IVILLIAM A.

H. SOHREIBER, OF PHCENIXVILLE, PENNSYLVANIA.

IMPROVEMENT IN EARIHENWARE FQR CULINARY DEPARTMENTS.

Specification forming part of Letters Patent No. fiiil fifi, dated May 26, 1874 application filed March 21, 1874.

To all whom it may concern:

Be it known that I, WILLIAM A. II. 80111113131312, of Phoenixville, Ohester county, Pennsylvania, have invented Earthenware for Culinary Departments, of which the following is a specification:

My invention has for its object furnishing an improved fire-proof earthenware, designed especially for the culinary department, con structed so as to insure safety from bursting by expansion and contraction, and at the same time so as to allow the heat to radiate from under the vessel, and also allow atmospheric air to mingle with the heated air under its bottom, thus preventing the contents of the vessel from burning.

The nature of my invention consists in making cooking utensils for the culinary department of fire-proof earthemvare, in such a manner that the bottoms will be corrugated for the escape of heated air, and permit an admixture of atmospheric air, as will hereinafter be more fully descr bed and shown in the-accompanying drawings, forming part of this specification, in which Figure 1 represents a side view of my improved stew-pan; Fig. 2, a sectional view of the same; Fig. 3, a side view of a nappy or pmlding-dish; Fig. 4, an elevation of a nappy or piidding-dish. Fig. 5 represents a tea-pot, pitcher, or other vessel with small parcels of clay attached to the peripheries of the bottom, being a modification of my invention.

The corrugations may be made in any approved manner or style, and applied to articles of various forms, but the above will sut rice to illustrate my invention.

These articles for the preparation of food are made of fire-proof earthenware, as before described, and may be made of any design, pattern, or style.

I find that if I leave the bottom of such vessel unglazed, so that .there is but one sub stanccviz., th e clay botto1nto be acted upon by the heat, instead of twoviz., the clay bot tom and gloss enamel-having difierent degrees of cxpansibility, the danger of bursting is avoided; and by further constructing such bottoms with corrugations, allowing the escape of heated air from under pie-plates, or bakingpans, or like utensils resting on flat surfaces in an oven, the heat has free circulation and access to all parts of said vessel, whereby a uniformity of heat is maintained and applied to all parts at the same time. I also enamel the inside of said vessels, if de sired, with a white enamel made of porous clay peculiarly mixed, which has the same degree of expansibility as that of which the vesscl is made, and which will be the subject of another application.

When it is possible to make such vessels in molds of plaster, or its equivalent, I embody the corrugations in the molds.

Onware made on a throwers wheel, I corrugatc the bottoms with tools to suit the various kinds of ware by grooving the same after being partly dry, or adding small quantities of clay of various shapes, as represented in I thus produce a neat, clean, reliable and substantial cookin g utensil for the kitchen and other purposes.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

Externally and internally glazed cooking and other utensils, made of clay, having concave bottom, un glazed, and corrugated edges, the former adding to its strength, while, by means of both, a large quantity of heated air is admitted under the utensil, substantially as claimed.

W. A. II. SCIIREIBER.

lVitnesscs 1. G. CAREY, Sr. (J. SMITH. 

